Fountain pen



P. L. WlKHElM Feb. 21, 1950 FOUNTAIN PEN Filed Jan. 12, 1946 INVENT/E f2.1.. M//KHf/m .ley

Patented Feb. 21, 1950 "UNITED v.STATES PATENT OFFICE FOUNTAIN PEN Peder L. Wikhem, Seattle, Wash.

1 Applicati'pn' January 12, 194s, serial No. 640,917

provision of an improved form of ink reservoir designedfto better control the now of ink to the penpointfor nib. -1 y 'It"is 'the principal-object of this invention to provide a fountain pen havingan improved form ofink container; that 'is removably applicable 10 ,to'the fb'ar-'rel orbody of the pen, and which container comprises "a cylindrical portion lwithin which a 'piston' i's contained'for the quick lling of` the container with`ink by suction, also to provide the piston with'an actuating rod com- 15 prising parts that may be telescoped together in the pen 'when not` in use.

It is also/an object of the invention to provide an ink containeror reservoir from which ink will flow in-an even and regulated amount, and 20 which container is of rigid character and may beV easily and readily appliedto .or removed from thepen.- Another object is to provide .a telescopic pis-` ton frod assembly for use -with piston filled pens y or injection syringes. I

Yet anothery object is to provide a pen from whichv the contained lparts maybe easily and readily removed for repair or replacement.

..Still other objects of the invention reside in 304 theA details of .construction of the various parts and in the relationship and mode of use of these parts, as will hereinafter be fully described.

In accomplishing these and other objects of the invention,I-have:provided the-improved de- 35 tails `of construction, the .preferred forms of w'hiclareillustrated inthe accompa'tnyin'g drawings, wherein- Fig. l is'a longitudinal, sectional view of a fountain: pen embodying the improvementsin accordance with the objects ofthe present invention. j

v- Fig. 2 is. a viewfwith part broken away, showingv` the manner of extending the televscoping sections of the piston` actuatingrod and the means for joining them in extended relationship. Fig;f3 is a cross section on line 3-3 in Fig. l'.. Fig. 4 is a cross section on line 4-4 in Fig. l. Fig. 5 is a perspective view of the cap that is applicable to the end of the pen for protection of the nib.

Fig. 6 is an enlarged detail of parts of the barrel reservoir.

Referring more in detail to the drawings- The present fountain pen comprises a tubular 2 Claims. (Cl. 1Z0- 47) barrel portion thatis made up of ,a lower or marin section I and an upper end section 2; these* parts being joined together by applying the internally threaded end portion 3 of section 2 over the externally threaded end portion 4 of section I. gether in a closed joint, as at 5 in Fig. 1, and the outer surfaces at the joint are flush as shown, so as not to interrupt the external smoothness of the barrel.

At its upper end, the tubular section or parti 2 has a cap 6 threaded thereto as at 1, and this cap also joins the section 2 in a flush external surface. As noted in Fig. l, the cap 6 is hollow and encloses the closed upper end portion of the section 2 therein.

At its lower end, the barrel section I mounts a, pen nib I0 therein in the usual manner, and ink is fed to the nib through a channel II in a tubular insert I2 which may serve to hold the nib in place. Ink is supplied to the channel II from a tubular reservoir I5 that is removably contained in the barrel section I, and which has a central, axial port or channel I6 in its lower end wall I1 directly aligned with the channel II of the insert I2.

It is shown in Figs. l and 6, that the lower end portion of the reservoir I5 is somewhat diametrically reduced and thus a downwardly facing annular shoulder I8 is formed near its end. Also it is observed that an upwardly iacing, annular shoulder I9 is formed in the lower end portion of barrel I adjacent the channel II. In the assembling of parts, the shoulder I8 is engaged against the shoulder I9 and provides a sealed joint at this point. It is desirable also that the reduced lower end portion of the reser-4 voir below the shoulder I8 be formed with' a thread, as at 23, for threading into the barrel chamber below shoulder I9, as seen in Fig. 6, to hold these parts together when the section 2 is removed from the section I.

At its upper end, the tubular reservoir I5 is closed by a cap 25 that is threaded thereon and this cap is vengaged by an annular, downwardly facing shoulder 26 inside the lower end portion of the tubular barrel .section 2. When section 2 is threaded onto part I, it holds the ink containing reservoir I5 tightly in place.

Reciprocally tted inthe upper end portion of the reservoir I5 is aQ-piston 28. This is fixed to the lower endjoi a ytubular shaft, or rod, 29 that extends upwardly through a central opening -30 in the cap 25. Fixed to the upper end of shaft 29 is a cross head 32 that is movable, up

The joined parts are tightened to-V in disclosed be understood to apply not only to pens but to such syringes. Manifestly the piston 28, under control of the rods 29 and 35 may be used to ll the reservoir and also to expelthe liquid therefrom.

Furthermore, it is to be understood that proportions, sizes, details and materials employed may be varied without departing from the inventiizm- Having thus described my invention, what I claim as new therein and desired to secure by vided an extension rod for the connection" to the rod 29.

The extension rod is telescopically `contained in the tubular rod 29, andV it extends from the latter through a central operi-1 ing 3S in the cross headr 32 and, also through a central opening 31 in the upper end wall of the section 2 and is permanently fixed in the end wall of cap 6.

At itsV inner end, the. rod .35.15. provided with" upper end section, threaded at its lower end onto Vthe said lower end section and having a closed a, threaded head and this may be threaded into an internally threaded upper end portion 4l of the shaft 29,l as it has. been shown in Fig. 2. f By reason. of they cross head 32 being held against Y.

relative rotation in the barrel, the threading of the head 4I! into and from the threaded part 4l of shaft 29 may be easily and readily accom,- v, plished by turning the. cap 6. assuming of course,

that the cap has been Unthreaded from the bar` rel, and the parts 40 and 4l. brought into prqper relationship.

Assuming, the parts of, the pen to be in. the position of Fig.y 1, and that it is. desired to ill the pen, the procedure. would be asY follows: First;4

the cap 6 is unthreaded from the` upper end of,`

the barrel section 2 and the rod 3.5 drawn out until the head 4,0 at its, inner end is engaged with the threads 4l at. the upper end of shaft. 29,. Then by turning the cap. the. parts are joined as. in Fig. 2.. When the parte 29 and 35, have been so joinedx the, piston 2.8 is pushed. inwardly into the reservoir to the dotted line showing of` its position in. Fig. l. Then the pen nib is properly inserted into a` supply of ink., and. the piston then pulled back to. the. outer end oi reservoir. Thus, by reason of suction created by this movement of the, piston, ink is drawn into the reservoir through.- the ink QlfiarmelY H and. channel I6 in the lower endoi the reservoir. The.. extension. rod is thenunthreaded, by turning cap Q, and is teleseoped back into tube 2 9 and the cap threaded into the barrel as in Fig. l.

The point l0 may be. protected While the dea vice is not. in use by applying a cap. 5.0 as showniu. Fie. 5 to. the barre1 end.- 'Ihis also. applibable to, the. upper end... i Thistyne Qi pistou. and, rod. mechanism may likewise. be applied te. riens. wherein. the ba A1 chamber. Serves.. as therink.. reservoir and. wherein. the. piston. would.. operate therein instead. 0f;` a separate receptacle, AlLQ, it. is applicable to Various types of hypodermic Syringes. and need not be. conued. t0. structures. as. in Fig. 1.. f -v It iS possible. to apply the. present, Construction. tov medical Syringes. of various. Kinds. where;1 e. hypodermic needle or other injection instrument is applied at the position of the pen nib l0. Therefore, it is intended that the invention here- Letters Patent is:

l. A pen comprising a tubular barrel having a tubular lower end section mounting an axially channeled pen nib in its lower end, a tubular upper'- end. formed with a central opening and having longitudinally extending llieyways formed interiorly thereof.; a can removably anelied te the uriner end or said upper end election.. a cylindric'al mls eentainerremevably fitted' within the.y

lower end section of' the barrel.,hav-ingY a lower" end iilling opening through. which the nibfwill:

be. fed, a cap applied; te the iinnern end; of; the ink container to seat againstftlie end. or the lower sectionL andhayingfa central @neming therein and. saidv upper end section of tri/hold the.. ink container .Seated inthe. barrel:

a. piston reciprocally fitted in the. inl:J container..

a. tubular piston rod extendedfirem the piston and through. the. container'cap opening and, have. .ing an internallythreaded outer end portion.'

across headiixed on .the outenend of the piston rod and engaging the.l lreywaysx,V an extension rod telescopieally applied to the piston rod; and ex-i tended through the. outer end opening oiY the'.v outer section of the barrelL and fixed to the cap thereon, said rodI havlngwa threaded head.

at its lower end; adapted to be/"engaged with the.4

threaded end of the tubular'rod,-when the barrel' cap isI removed and: said rodi-drawn out, thus.

' to provide an actuating meansrcr the piston.

2. A pen as recited in claim-1 wherein the lower section ofthe vbarrel is formed near the nib mounting end with an internal 1 upwardly facing' annular shoulder, and saidink container hasl a downward-lyv facing shoulder near its lower end to engage in a. tig/ht joint'against'said up wardlyr facing shoulder. Y 4

FEDER L.

naieanneefis einen.

The; follwinevrefereaces ai' of renard, 11i the file of this patent:

Number Name 826,552 Dunn July 2 4., 1906 873,769 MQIIS,A Dee.- 1;"7, 11901 1,317,817' v Qgi'lV-y Oct. "I,r 1919. 1,40%6'16 Taddeo ...fr s-, Man 14,1922

FoaEIQN APa L Number Country". Date- Greaty Britain .'.f 19.37

` e barrel having a. shoulder therein te engage. sailnet said can., 

